The act of scrunching up your lazy eye and looking directly at someone. Either scrunching up your lazy eye, or squinting both of your eyes. The Natestare is most horrific when the individual staring has light blue eyes.
The Natestare is used when an individual insults something, and the victim says something snappy or smart and the Natestarer can't think of a comeback, so they stare.
Ted: Shut up
Nate: You shut up